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When considering the 2020 emission limit of 427 million metric tons
of carbon dioxide equivalent (MMTCO2E) of greenhouse gases (GHG),
what method of GHG accounting is used?  
For instance, ethanol production varies widely in carbon intensity,
depending on such factors as the whether it originates from corn or
sugar cane, the amount of energy needed to process it and transport
it, the impact on land and whether rain forest was cut down to make
room for the crop, or, in the case of U.S. corn ethanol subsidies,
corn crops displacing soy bean production, which in turn went to
Brazil which cut down forest to produce more soy beans that were
once produced in the U.S. 

Secondly, some studies have suggested that hydropower, depending on
where it is sited, can be a net negative for GHG emissions because
it can drown carbon-impounding forests while the rotting plant
matter releases large amounts of methane.  Given this, will
hydropower from BC Power have a higher imputed GHG load than
hydropower from the Hoover Dam, which did not drown forests as it
was built in a desert?